One of the guys who worked at the same pizza joint I did told me that once the door was answered by a drunk, completely naked chick. Knocked him speechless for a few seconds. Then he heard a guy behind her say, "Put on some clothes for chrissake." So she pulled on a sweater.

My most memorable story was delivering to the shady part of town once, and when I went in, there were four young black guys and a great big pile of white powder on a table. They were, incidentally, as polite as they could be, and they gave me a decent tip. My average tip from college students over three years was $0.00, but they were very generous with helpful screamed tips like "YOU'RE LATE MOTHERFARKER."